Humans were also animals in the conventional sense, and anything taken from any animal in nature had value in use.
Of course, people considered using materials from their own kind rather taboo. Yet throughout the long course of history, items made from human materials had often been highly sought after, becoming ritual vessels or musical instruments.
People believed that all things possessed spirits, and humans stood foremost among all living beings. Therefore, things made from human materials naturally possessed "spirituality" as well.
In ancient China, skulls were most often used as wine cups or lampstands. There were also drums made from human skin, which were said to have a rather interesting sound when struck.
In ancient Europe, human skin was often used as book covers. Of course, skulls were also sometimes used as goblets or decorations for instruments of torture.
The Mayans were probably the ones who took it furthest. Their slaughter of slaves was notorious throughout the world, but back then, they also had a habit of playing with their relatives' bones.
After a family member died, they would select an arm bone or shinbone, drill holes in it, turn it into a flute, and carry it with them. People at the time believed that if they blew such a flute, their relative's soul would return to reunite with them.
In short, the use of human materials was hardly unprecedented. Diana simply had a hard time accepting the idea of laying hands on a teammate.
But when Deadpool mentioned Gin, she had no more objections. Her innate competitive streak immediately drove Diana to draw her blade and peel a layer of skin off Deadpool like peeling an onion.
Morality and such no longer mattered. What mattered was that she could not lose. If Gin could do it, then she